Jesús Ambrosiani

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Homotopic and isochronic transplantation of the alar plate of the rhombomeres 7 and 8 was performed between chick and quail embryos at the stage of 10-14 somites. Analysis of the graft derivatives in 12-day-old chimeric embryos by means of the quail nucleolar marker showed that the ipsilateral inferior olive is formed from the transplanted neuroepithelium.(More)
In neonatal rats the injection of Fast Blue and Diamidino Yellow retrograde fluorescent tracers, each into separate cerebellar hemispheres, reveals the presence of double-labelled neurons positioned bilaterally in the inferior olivary complex during the early postnatal period (postnatal day 0 to postnatal day 5). This suggests that those neurons whose axons(More)
Ultrastructurally, two different bipolar cell types can be distinguished in the retina of the chick embryo: one pale or electron-lucent and the other dark or electron-dense. The different electron density was seen over the whole cell, from its enclave in the outer limiting membrane to its termination in the inner plexiform layer. These observations prompted(More)
Procalcitonin (PCT) is a 116-amino acid polypeptide physiologically produced, as the precursor protein of calcitonin (CT), in the parafollicular cells of the thyroid gland, but physiological functions and other major sources of PCT remains unclear. The distribution of PCT-like immunoreactivity (PCT-LI) in the rat hypothalamus was examined by(More)
On a morphological and ultrastructural level, we studied a thickening which appears on the ascending prolongation of bipolar cells in the chick retina. We first observed this thickening on day 10 of incubation and it remains unchanged throughout the postnatal life of the chick. Its presence seems to be related to the synaptic activity at a dendritic level(More)
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